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diff --git a/src/ExtensionsMethods.cs b/src/ExtensionsMethods.cs
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-//
-// ExtensionsMethods.cs
-//
-// Author:
-// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
-//
-// Copyright (c) 2013-2017 Jean-Philippe Bruyère
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-using System;
-using System.Linq.Expressions;
-
-namespace Crow
-{
- public static class ExtensionsMethods
- {
- #region Cairo extensions
-
- public static void Rectangle(this Cairo.Context ctx, Rectangle r, double stroke = 0.0)
- {
- if (stroke > 0.0) {
- ctx.LineWidth = stroke;
- double shw = stroke / 2.0;
- ctx.Rectangle (r.X + shw, r.Y + shw, r.Width - stroke, r.Height - stroke);
- ctx.Stroke ();
- }else
- ctx.Rectangle (r.X, r.Y, r.Width, r.Height);
- }
- public static double GetLength(this Cairo.PointD p){
- return Math.Sqrt (Math.Pow (p.X, 2) + Math.Pow (p.Y, 2));
- }
- public static Cairo.PointD GetPerp(this Cairo.PointD p){
- return new Cairo.PointD(-p.Y, p.X);
- }
- public static Cairo.PointD GetNormalized(this Cairo.PointD p){
- double length = p.GetLength();
- p.X /= length;
- p.Y /= length;
- return p;
- }
- public static Cairo.PointD Substract(this Cairo.PointD p1, Cairo.PointD p2){
- return new Cairo.PointD(p1.X - p2.X, p1.Y - p2.Y);
- }
- public static Cairo.PointD Divide(this Cairo.PointD p1, double d){
- return new Cairo.PointD(p1.X / d, p1.Y / d);
- }
- public static Cairo.PointD Add(this Cairo.PointD p1, Cairo.PointD p2){
- return new Cairo.PointD(p1.X + p2.X, p1.Y + p2.Y);
- }
- public static Cairo.PointD Multiply(this Cairo.PointD p1, double v){
- return new Cairo.PointD(p1.X * v, p1.Y * v);
- }
- public static void DrawCote(this Cairo.Context ctx, Cairo.PointD p1, Cairo.PointD p2,
- double stroke = 1.0, bool fill = false, double arrowWidth = 3.0, double arrowLength = 7.0)
- {
- Cairo.PointD vDir = p2.Substract(p1);
- vDir = vDir.GetNormalized ();
- Cairo.PointD vPerp = vDir.GetPerp ();
-
- Cairo.PointD pA0 = p1.Add(vDir.Multiply(arrowLength));
- Cairo.PointD pA1 = p2.Substract(vDir.Multiply(arrowLength));
-
- Cairo.PointD vA = vPerp.Multiply (arrowWidth);
-
- ctx.MoveTo (p1);
- ctx.LineTo (pA0.Add (vA));
- if (fill)
- ctx.LineTo (pA0.Substract (vA));
- else
- ctx.MoveTo (pA0.Substract (vA));
-
- ctx.LineTo (p1);
-
- ctx.MoveTo (p2);
- ctx.LineTo (pA1.Add (vA));
- if (fill)
- ctx.LineTo (pA1.Substract (vA));
- else
- ctx.MoveTo (pA1.Substract (vA));
- ctx.LineTo (p2);
-
- if (fill)
- ctx.Fill ();
-
- ctx.MoveTo (p1);
- ctx.LineTo (p2);
- ctx.LineWidth = stroke;
- ctx.Stroke ();
- }
- public static void DrawCoteInverse(this Cairo.Context ctx, Cairo.PointD p1, Cairo.PointD p2,
- double stroke = 1.0, bool fill = false, double arrowWidth = 3.0, double arrowLength = 7.0)
- {
- Cairo.PointD vDir = p2.Substract(p1);
- vDir = vDir.GetNormalized ();
- Cairo.PointD vPerp = vDir.GetPerp ();
-
- Cairo.PointD pA0 = p1.Add(vDir.Multiply(arrowLength));
- Cairo.PointD pA1 = p2.Substract(vDir.Multiply(arrowLength));
-
- Cairo.PointD vA = vPerp.Multiply (arrowWidth);
-
- ctx.MoveTo (p1.Add (vA));
- ctx.LineTo (pA0);
- ctx.LineTo (p1.Substract (vA));
- if (fill)
- ctx.LineTo (p1.Add (vA));
-
- ctx.MoveTo (p2.Add (vA));
- ctx.LineTo (pA1);
- ctx.LineTo (p2.Substract (vA));
-
- if (fill) {
- ctx.LineTo (p2.Add (vA));
- ctx.Fill ();
- }
-
- ctx.MoveTo (pA0);
- ctx.LineTo (pA1);
- ctx.LineWidth = stroke;
- ctx.Stroke ();
- }
- public static void DrawCoteFixed(this Cairo.Context ctx, Cairo.PointD p1, Cairo.PointD p2,
- double stroke = 1.0, double coteWidth = 3.0)
- {
- Cairo.PointD vDir = p2.Substract(p1);
- vDir = vDir.GetNormalized ();
- Cairo.PointD vPerp = vDir.GetPerp ();
- Cairo.PointD vA = vPerp.Multiply (coteWidth);
-
- ctx.MoveTo (p1.Add (vA));
- ctx.LineTo (p1.Substract (vA));
- ctx.MoveTo (p2.Add (vA));
- ctx.LineTo (p2.Substract (vA));
- ctx.MoveTo (p1);
- ctx.LineTo (p2);
- ctx.LineWidth = stroke;
- ctx.Stroke ();
- }
-
- public static void SetSourceColor(this Cairo.Context ctx, Color c)
- {
- ctx.SetSourceRGBA(c.R,c.G,c.B,c.A);
- }
- public static void AddColorStop(this Cairo.Gradient grad, double offset, Color c)
- {
- grad.AddColorStop (offset, c);
- }
- #endregion
-
- public static Orientation GetOrientation(this Alignment a){
- return (a==Alignment.Left) ||(a==Alignment.Right) ? Orientation.Horizontal : Orientation.Vertical;
- }
- public static Alignment GetOpposite(this Alignment a){
- switch (a) {
- case Alignment.Left:
- return Alignment.Right;
- case Alignment.Right:
- return Alignment.Left;
- case Alignment.Top:
- return Alignment.Bottom;
- case Alignment.Bottom:
- return Alignment.Top;
- case Alignment.TopLeft:
- return Alignment.BottomRight;
- case Alignment.TopRight:
- return Alignment.BottomLeft;
- case Alignment.BottomLeft:
- return Alignment.TopRight;
- case Alignment.BottomRight:
- return Alignment.TopLeft;
- }
- return Alignment.Center;
- }
- public static void Raise(this EventHandler handler, object sender, EventArgs e)
- {
- if(handler != null)
- {
- handler(sender, e);
- }
- }
- public static void Raise<T>(this EventHandler<T> handler, object sender, T e)
- {
- if(handler != null)
- {
- handler(sender, e);
- }
- }
- public static byte[] GetBytes(this string str)
- {
- byte[] bytes = new byte[str.Length * sizeof(char)];
- System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
- return bytes;
- }
- public static bool IsWhiteSpaceOrNewLine (this char c)
- {
- return c == '\t' || c == '\r' || c == '\n' || char.IsWhiteSpace (c);
- }
- public static object GetDefaultValue(this object obj)
- {
- Type t = obj.GetType ();
- if (t.IsValueType)
- return Activator.CreateInstance (t);
-
- return null;
- }
- }
-}
-
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